Using Phantom.js

get-url-list.js

function generateGoogleSearchUrl(word, num) {
  var encodedWord = encodeURI(word);
  var number = '&num=' + (num || 50);
  var prefix = 'https://www.google.co.jp/search?q=';
  var suffix = '&ie=UTF-8';
  return prefix + encodedWord + number + suffix;
}


function getWordList(fileName) {
  var fs = require('fs');
  var file = fs.open(fileName, 'r');
  var wordList = file.read().split('\n');
  return wordList;
}


function writeResult(word, result) {
  var fs = require('fs');
  fs.makeDirectory('outputs');
  var file = fs.open('outputs/' + word, 'w');
  file.write(result);
  file.write('\n');
  file.flush();
}


function evalGetUrlList() {
  var links = document.getElementsByClassName('r');
  links = [].slice.call(links);
  var urls = links.map(function(link) {
    return link.children[0].href;
  });

  urls = urls.filter(function(url) {
    return !/.pdf$/.test(url);
  });

  return JSON.stringify(urls);
}


;(function _main() {
  var fileName = phantom.args[0];
  var urlNumber = +phantom.args[1];

  if (typeof fileName === 'undefined') {
    console.log('Error: no input file');
    phantom.exit(1);
    return;
  }

  var wordList = getWordList(fileName);
  var page = require('webpage').create();
  page.settings.userAgent = 'Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25';

  mainLoop(0);

  function mainLoop(current) {
    var word = wordList[current];
    if (!word) {
      phantom.exit();
      return;
    }

    var searchUrl = generateGoogleSearchUrl(word, urlNumber);
    page.open(searchUrl, function(status) {
      var resultJSON = page.evaluate(evalGetUrlList);
      var result = JSON.parse(resultJSON).join('\n');
      writeResult(word, result);
      setTimeout(function() { mainLoop(current + 1); }, 1000);
    });
  }

})();

simple-get-url-list.js

function generateGoogleSearchUrl(word, num) {
  var encodedWord = encodeURI(word);
  var number = "&num=" + (num || 50);
  var prefix = "https://www.google.co.jp/search?q=";
  var suffix = "&ie=UTF-8";
  return prefix + encodedWord + number + suffix;
}


;(function _main() {
  var word = phantom.args[0];
  var urlNumber = +phantom.args[1];
  var delay = +phantom.args[2] || 0;

  if (typeof word === "undefined") {
    console.log("Error: no search word");
    phantom.exit(1);
    return;
  }

  var page = require("webpage").create();
  // page.settings.userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7";
  page.settings.userAgent = "Mozilla/5.0 (iPhone; CPU iPhone OS 6_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/6.0 Mobile/10A403 Safari/8536.25";
  var serchUrl = generateGoogleSearchUrl(word, urlNumber);

  setTimeout(function() {
    main(word);
  }, delay);

  function main(word) {
    page.open(serchUrl, function(status) {
      var resultJSON = page.evaluate(function() {
        var urlList = [];
        var links = window.document.getElementsByClassName("l");

        for (var i = 0, linksLength = links.length; i < linksLength; i++) {
          urlList.push(links[i].href);
        }

        return JSON.stringify(urlList);
      });

      console.log(JSON.parse(resultJSON).join("\n"));
      phantom.exit();
    });
  }
})();